WatchMate vs PyNav
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WatchMate
This app provides remote control and situational awareness for your Vesper Marine AIS Transponder. View AIS targets, manage alarms, and control transponder settings directly from your mobile device.
- View AIS targets
- Manage collision prevention alarms
- Control Anchor Watch alarm
- View GPS position, course, and speed
- Remote control transponder settings
- Configure vessel AIS static data
- Perform firmware upgrades
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The WatchMate App connects with your Vesper Marine AIS Transponder to place remote control functionality and situational awareness in the palm of your hand on your iPhone or on your iPad. The WatchMate App becomes the user interface for configuring and remote control of your Vesper Marine AIS Transponder, especially where it does not have its own display such as the Vesper Marine XB-8000. - View AIS Targets received by your Vesper Marine AIS Transponder. - Setup and manage collision prevention alarm profiles. - Manage your MOB alarms. - Control and view your Anchor Watch alarm. - View your AIS Transponder's own GPS Position, Course and Speed. - Check the operational status of your AIS Transponder. - Remote control of your AIS Transponder settings. - Switch easily between Silent Mode and Normal Transmitting mode. - Configure your Vessel's AIS Static data. (MMSI, Call Sign, Vessel Type, Vessel Size) - Perform firmware upgrades. Connects to your WatchMate device's WIFI access point or by being on the same wifi network. - Supports Vesper Marine XB-8000 AIS Transponder. - Supports Vesper Marine WatchMate Vision®. The complex nature of our innovative WatchMate App makes coding mishaps difficult to eliminate despite the superhuman efforts of our developers so please remember Vesper Marine does not warrant that this product is error-free. As the adventurous user it's your job to exercise common sense and the best navigational judgement you can muster. Although we think the WatchMate App is awesome nothing beats using all your human senses, so best you still rely on these at least as much as you rely on the WatchMate App for making navigational safety decisions. Our advice is; even with the WatchMate App it’s still a clever idea to maintain a permanent watch and use more than one aid for navigation.
PyNav
This app provides NMEA instrument data and remote control for a pypilot autopilot. It can function as a standalone navigation hub, displaying wind, engine, and GPS data with customizable panels and configurable alarms.
- Pypilot autopilot control
- NMEA instrument display
- Customizable dashboard panels
- Wind and engine data
- GPS and waypoint navigation
- Configurable alarms
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NMEA NAVIGATION HUB + PYPILOT REMOTE CONTROL PyNav serves two kinds of sailors: - Have a pypilot autopilot? Control it from your iPhone/iPad AND display all your NMEA instruments. - No pypilot? Use PyNav as a standalone professional NMEA navigation hub. FREE VERSION - Autopilot tab + Settings Full control of the pypilot autopilot: - Engage / disengage the autopilot - Modes: compass, wind, GPS, true wind, navigation - Current heading + target heading entry - Real-time rudder angle indicator - IMU data: pitch, roll, heel, rate of turn - Full PID gain tuning (P, I, D, DD, PR, FF, WG, Deadzone) - IMU compass and rudder calibration - Tack settings - Pilot profiles (basic, wind, gps, simple, rate, absolute) - Servo stats: amp-hours, voltage, temperatures, runtime - Direct WiFi connection to the pypilot Raspberry Pi hotspot - no router needed The free version gives access to pypilot data only - no external NMEA instruments. PRO VERSION - Complete navigation hub One-time purchase, lifetime - no subscription. Works WITH or WITHOUT pypilot. Just needs a NMEA/WiFi module and an iPhone or iPad. Optimized for iPad - also works on iPhone with adapted layout. DASHBOARD - Customizable unified view 6 configurable, drag-and-drop panels: - Wind: dynamic rose or raw data grid - Navigation: SOG, COG, GPS data - Autopilot: engage/disengage, target heading, rudder indicator, IMU - Depth: color-coded - Pressure: hPa value, 3h trend, history chart - Engine: RPM with color coding (nominal / warning / danger) Resizable panels, 1 or 2 column layout. WIND - Apparent and true wind Dynamic wind rose, 5-minute history chart, real-time AWA/AWS/TWA/TWS. ENGINE INSTRUMENTS RPM, coolant and oil temperature/pressure, battery/alternator voltage, engine hours, fuel flow, exhaust and sea water temperature, gearbox state (Fwd/Neutral/Rev), transmission oil. Tank gauges: port/starboard fuel, fresh water, grey and black water. Unlimited custom charts (any parameter vs RPM or time). NAV - GPS and waypoint navigation Compass rose, true and magnetic heading, SOG, COG, STW, latitude/longitude (DD°MM'SS), waypoint navigation (bearing BTW, distance DTW, cross track error XTE), arrival indicator. CONFIGURABLE ALARMS On all NMEA data: depth, speed, heading, pressure, wind, RPM, temperatures, oil pressures, voltages, fuel levels, rudder angle. Each alarm: custom name, threshold, condition, individual on/off. Triggers: sound + vibration + on-screen banner. TECHNICAL REQUIREMENTS Free: iOS 13.4+, working pypilot setup (Raspberry Pi), direct WiFi connection to pypilot hotspot. PRO: any TCP/UDP NMEA/WiFi module (Yacht Devices, Quark-elec, Digital Yacht, Hat Labs, Actisense...) + iOS 13.4+. Pypilot optional. Supported protocols: NMEA 0183, NMEA 2000 Raw, Pypilot (TCP). SAFETY WARNING PyNav is a navigation interface. It does not replace mandatory navigation equipment. The skipper remains SOLELY RESPONSIBLE for navigation. Permanent watch at sea is MANDATORY. Pypilot is an open-source DIY project provided "as-is". PRIVACY No navigation data is sent to external servers. Runs 100% locally on your onboard network. No ads, no tracking. LEGAL Publisher: CL Consulting SASU - SIRET 94261399300016. GDPR compliant. Pypilot is an independent open-source project (Sean D'Epagnier, GPLv3). PyNav is not affiliated with the pypilot project.
Screenshots
Verdict
The clearest difference is review sentiment: PyNav at 100% against WatchMate's 44%. WatchMate's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PyNav sells 1 one-off in-app purchase. WatchMate asks for nothing beyond the download.
WatchMate ships an update every 2 months, PyNav every 5 weeks. The most recent releases landed on June 1, 2026 and September 7, 2026 respectively.
| Parameter | WatchMate | PyNav |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (11 ratings) — better | — |
| Positive reviews | 44.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 14 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Garmin New Zealand Ltd | CL Consulting |
Customer experience
WatchMate
PyNav
In-app purchases
WatchMate
No in-app purchases
PyNav
- PyNav Pro$7.99








